Bumpass Hell Trail

Route

Plan with 6 source-backed facts, 6 related records, and explicit uncertainty.

Check before choosing this trip

Rules can change across jurisdictions. Each fact below belongs to the named place; a connected place is not automatically part of your itinerary. This is recorded evidence; recheck current rules and conditions before travel.

Traversed place

Lassen Volcanic National Park

Pretrip current conditions recheck

Required
Yes
Topics
  • alerts and closures
  • roads
  • trails
  • fire and smoke
  • snow
  • facilities
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-lassen-national-park

  1. Evidence stance: supports · Evidence details

    The current-conditions page is the operational source for alerts, roads, trails, fire and smoke, snow, facilities, and closures.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-22T19:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

Source: National Park Service. Retrieved: 2026-09-22.

Still unresolved

Review unresolved questions · Compare connected places and approaches

Plan a visit

Requirements and current conditions

Pretrip trail conditions recheck

Recorded for: Lassen Volcanic National Park

Required
Yes
Topics
  • trail status
  • road access
  • snow
  • bridges
  • burned area hazards
  • parking limits
Warning
trail status alone does not establish road or park-wide access
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-lassen-peak-trail, scope-route-brokeoff-mountain-trail, scope-route-cinder-cone-trail, scope-route-bumpass-hell-trail, scope-route-devils-kitchen-trail, scope-route-boiling-springs-lake-trail, scope-route-terminal-geyser-trail

  1. Evidence stance: supports · Evidence details

    NPS publishes dated, area-specific trail status, mileage, difficulty, parking notes, snow, bridge, and Dixie Fire impacts and warns that trail status does not establish road or park-wide access.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T03:30:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

Routes and geography

Official dataset route segment

Recorded for: Bumpass Hell basin approach junction to basin entry

Coordinate reference system
EPSG:4269
Dataset feature id
bb47380f-f9c1-43dc-b734-cdc1435cf00b
Dataset feature name
Bumpass Hell Trail
Dataset field
lengthmiles
Distance miles
0.02984205
Distance status
known
End coordinate
Latitude
40.4573718
Longitude
-121.5023271
Operational status requires current check
Yes
Route role
official mainline
Source data description
NPS Trails 11/2019
Source load date
2024-09-04T08:26:58.000
Source mode attributes
Bicycle
No
Hiker pedestrian
Yes
Pack saddle
No
Source originator
National Park Service
Start coordinate
Latitude
40.45718
Longitude
-121.5027609
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    In the USGS Topo Map Vector Data product 25034 Lassen Peak CA, NPS-originated Bumpass Hell Trail feature d0d63ec3-c99c-41e0-a353-50ac64f4fff8 runs from (-121.5140219, 40.4661208) to (-121.5027609, 40.4571800) with lengthmiles 1.26580720. Feature bb47380f-f9c1-43dc-b734-cdc1435cf00b continues from that exact endpoint to (-121.5023271, 40.4573718) with lengthmiles 0.02984205, where it shares an endpoint with a Bumpass Hell Boardwalk feature and a separate Bumpass Hell Trail feature continuing east. The trail features identify National Park Service as source originator and NPS Trails 11/2019 as their source-data description; the dataset warns that temporal changes may have occurred.

    Publisher
    U.S. Geological Survey
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: U.S. Geological Survey

Official dataset route segment

Recorded for: Bumpass Hell trailhead to basin approach junction

Coordinate reference system
EPSG:4269
Dataset feature id
d0d63ec3-c99c-41e0-a353-50ac64f4fff8
Dataset feature name
Bumpass Hell Trail
Dataset field
lengthmiles
Distance miles
1.2658072
Distance status
known
End coordinate
Latitude
40.45718
Longitude
-121.5027609
Operational status requires current check
Yes
Route role
official mainline
Source data description
NPS Trails 11/2019
Source load date
2022-01-14T10:16:12.000
Source mode attributes
Bicycle
No
Hiker pedestrian
Yes
Pack saddle
No
Source originator
National Park Service
Start coordinate
Latitude
40.4661208
Longitude
-121.5140219
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    In the USGS Topo Map Vector Data product 25034 Lassen Peak CA, NPS-originated Bumpass Hell Trail feature d0d63ec3-c99c-41e0-a353-50ac64f4fff8 runs from (-121.5140219, 40.4661208) to (-121.5027609, 40.4571800) with lengthmiles 1.26580720. Feature bb47380f-f9c1-43dc-b734-cdc1435cf00b continues from that exact endpoint to (-121.5023271, 40.4573718) with lengthmiles 0.02984205, where it shares an endpoint with a Bumpass Hell Boardwalk feature and a separate Bumpass Hell Trail feature continuing east. The trail features identify National Park Service as source originator and NPS Trails 11/2019 as their source-data description; the dataset warns that temporal changes may have occurred.

    Publisher
    U.S. Geological Survey
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: U.S. Geological Survey

Published route description

Recorded for: Bumpass Hell Trail

Basin boardwalk
Yes
Kings creek access alternative
Yes
Most hikers return from second overlook
Yes
Second basin overlook route
Yes
Usual destination
hydrothermal-area-bumpass-hell
Usual start
trailhead-bumpass-hell
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

Published route profile

Recorded for: Bumpass Hell Trail

Elevation range ft
  • 8200
  • 8400
Parking
limited and often full mid-morning to early afternoon
Round trip miles
3
Round trip time hours
2
Typical season
approximately late July through October
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    Bumpass Hell Trail starts at Bumpass Hell parking seven miles from the Southwest Entrance; it is a three-mile round trip taking about two hours and is generally available only in late summer and fall. Parking is limited.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T03:30:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

More planning facts

Source page profile variations

Recorded for: Bumpass Hell Trail

Descent feet
  • 200
  • 300
Duration minutes
  • 90
  • 120
Southwest entrance distance miles
  • 7
  • 8
Surface descriptions
  • packed gravel
  • hardpacked dirt and rock
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

Explore related places

Access and approaches (2)

Land and management (2)

Routes and related places (2)

Before you go

These open questions need confirmation; Wayproof does not fill them with guesses.

What exact boardwalk circulation and Kings Creek alternative should a complete Bumpass Hell visitor traversal use?

The official dataset supports a connected 1.29564925-mile approach from the Bumpass Hell parking area to the basin entry. Separate boardwalk branches and a trail continuing east share the basin endpoint, while NPS describes a second overlook and a Kings Creek alternative without an unambiguous atomic visitor path in this batch. The published three-mile round-trip profile may include basin circulation not represented by the two approach features, so Wayproof does not force their values to match.

Open question. Linked evidence does not resolve this gap.

Published route description

Basin boardwalk
Yes
Kings creek access alternative
Yes
Most hikers return from second overlook
Yes
Second basin overlook route
Yes
Usual destination
hydrothermal-area-bumpass-hell
Usual start
trailhead-bumpass-hell
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

Which Bumpass Hell access distance, duration, descent, and surface description should a traveler rely on?

The current NPS page publishes internally different values or descriptions for distance from the Southwest Entrance, duration, descent, and trail surface. Wayproof preserves those variations rather than silently selecting one.

Open question. Linked evidence does not resolve this gap.

Source page profile variations

Descent feet
  • 200
  • 300
Duration minutes
  • 90
  • 120
Southwest entrance distance miles
  • 7
  • 8
Surface descriptions
  • packed gravel
  • hardpacked dirt and rock
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-bumpass-hell-trail

  1. Evidence stance: supports · Evidence details

    NPS describes the usual Bumpass Hell hike as a three-mile round trip from the Bumpass Hell parking area: the first mile is mostly flat, the trail then drops into the basin, and a boardwalk provides close views. A second trail skirts the north edge and continues to a second overlook; most hikers return from there. The page also says the basin is accessible by a trail from Kings Creek. Within the same page, the parking area is described as both seven and eight miles from the Southwest Entrance, duration as two hours and 90 minutes, descent as 200 and 300 feet, and surface as packed gravel and hardpacked dirt and rock.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T21:00:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

What exact segment traversal connects each remaining published Lassen trailhead and destination, including shared junctions and alternatives?

Wayproof publishes complete, bidirectional, distance-bearing trailhead-to-summit approaches for Lassen Peak and Brokeoff Mountain, plus a bounded summit approach for Cinder Cone; a connected distance-bearing parking-to-basin-entry graph for Bumpass Hell; and the atomic shared approach plus around-lake network for Boiling Springs Lake. Cinder Cone rim/crater circulation and the full Bumpass basin circulation remain explicit route-specific gaps. It also publishes ordered, bidirectional Warner Valley topology for Devils Kitchen and Terminal Geyser, but atomic leg distances remain unknown where route descriptions print only cumulative positions. These remaining questions still require route-specific reconciliation.

Open question. Linked evidence does not resolve this gap.

Pretrip trail conditions recheck

Required
Yes
Topics
  • trail status
  • road access
  • snow
  • bridges
  • burned area hazards
  • parking limits
Warning
trail status alone does not establish road or park-wide access
Evidence and sources (1)

No claim effective interval recorded.

Spatial scope IDs: scope-route-lassen-peak-trail, scope-route-brokeoff-mountain-trail, scope-route-cinder-cone-trail, scope-route-bumpass-hell-trail, scope-route-devils-kitchen-trail, scope-route-boiling-springs-lake-trail, scope-route-terminal-geyser-trail

  1. Evidence stance: supports · Evidence details

    NPS publishes dated, area-specific trail status, mileage, difficulty, parking notes, snow, bridge, and Dixie Fire impacts and warns that trail status does not establish road or park-wide access.

    Publisher
    National Park Service
    Observer / attribution
    Not recorded
    Observed at
    Unknown
    Retrieved at
    2026-09-23T03:30:00+00:00

    Retrieval time does not establish when an event occurred.

    Observation details · Source details · Original source: National Park Service

Sources, evidence, and history

Planning facts above are readable first. Open these records when you need to audit a source or see when knowledge changed.

Evidence for 6 published claims
Published ChangeSet history

Canonical data is historical evidence, not a guarantee of current conditions. Recheck volatile facts before travel.